Area Forecast Discussion
Issued by NWS Sterling, VA

Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
-- Remove Highlighting --
-- Discussion containing changed information from previous version are highlighted. --
000 FXUS61 KLWX 181848 AFDLWX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 248 PM EDT FRI JUL 18 2014 .SYNOPSIS...
-- Changed Discussion --
HIGH PRESSURE WILL MOVE OFF THE COAST SATURDAY...AND THEN WILL REMAIN ALONG THE EASTERN SEABOARD THROUGH EARLY NEXT WEEK. A COLD FRONT WILL APPROACH DURING THE MIDDLE OF NEXT WEEK.
-- End Changed Discussion --
&& .NEAR TERM /THROUGH SATURDAY/...
-- Changed Discussion --
SURFACE HIGH WAS CENTERED OVER PENNSYLVANIA THIS AFTERNOON. DESPITE HIGH PRESSURE NEARBY...WE/VE SEEN SCT-BKN MID-HIGH CLOUDS WELL IN ADVANCE OF AN UPPER TROUGH OVER THE LOWER MISSISSIPPI VALLEY. TEMPERATURES WERE WARMING INTO THE UPPER 70S AND LOWER 80S ACROSS THE CWA. HIGH PRESSURE WILL MOVE OFF THE COAST TONIGHT INTO SATURDAY...ALLOWING EASTERLY FLOW TO DEVELOP. MEANWHILE...THE UPPER LOW WILL LIFT NORTHEAST INTO/THROUGH THE TENNESSEE VALLEY. EXPECT SHOWERS ALREADY OCCURRING OVER SOUTHWEST VIRGINIA TO RIDE UP THE POTOMAC HIGHLANDS TONIGHT AND SATURDAY. SHOWERS COULD EVEN EXTEND AS FAR EAST AS THE SHENANDOAH VALLEY FOR A TIME...BUT AM NOT EXPECTING SHOWERS TO MAKE IT EAST OF THE BLUE RIDGE. HOWEVER...EXPECT PLENTY OF CLOUD COVER TO BE IN PLACE AND SKY GRIDS REFLECT MOSTLY CLOUDY/CLOUDY SKIES SATURDAY. EASTERLY FLOW WILL ALSO KEEP TEMPERATURES BELOW NORMAL.
-- End Changed Discussion --
&& .SHORT TERM /SATURDAY NIGHT THROUGH MONDAY/...
-- Changed Discussion --
HIGH PRESSURE REMAINS ALONG THE NORTHEAST/MID-ATLANTIC COAST SUNDAY INTO MONDAY. WEAK WAVE COULD BRUSH A FEW SHOWERS INTO LOWER SOUTHERN MARYLAND...OTHERWISE CHANCE OF CONVECTION WILL MAINLY BE RELEGATED NEAR AND WEST OF THE BLUE RIDGE. EASTERLY FLOW WILL KEEP TEMPERATURES BELOW NORMAL...ALTHOUGH DEWPOINTS WILL BEGIN CREEPING UP BY EARLY NEXT WEEK.
-- End Changed Discussion --
&& .LONG TERM /MONDAY NIGHT THROUGH FRIDAY/...
-- Changed Discussion --
INCREASING MOISTURE AND WEAK TO MODERATE PVA EXPECTED ACROSS CWA DURING THE MID-WEEK PERIOD. MAIN CHANCE OF THUNDERSTORMS WILL BE FROM LATE WEDNESDAY AFTERNOON THROUGH THURSDAY AHEAD OF APPROACHING COLD FRONT. TEMPERATURES BACK TO OR SLIGHTLY ABOVE NORMAL AHEAD OF THE FRONT. DRYING IN NORTHWEST FLOW BEHIND THE FRONT FOR FRIDAY.
-- End Changed Discussion --
&& .AVIATION /18Z FRIDAY THROUGH WEDNESDAY/...
-- Changed Discussion --
VFR EXPECTED DURING THE VALID TAF PERIOD...WITH THICKENING MID LEVEL CLOUDS. SHOWERS ASSOCIATED WITH A TROUGH SHOULD REMAIN WEST OF THE BLUE RIDGE THROUGH SATURDAY. VFR LIKELY TO CONTINUE INTO EARLY NEXT WEEK AS HIGH PRESSURE WILL BE LOCATED ALONG THE NEW ENGLAND/MID-ATLANTIC COAST. THERE WILL BE MORE CLOUDS...BUT AT THIS TIME THESE LOOK TO MAINLY BE OF THE VFR VARIETY. TSRA CHANCE LOOKS MAINLY RELEGATED TO THE HIGHER TERRAIN UNTIL WEDNESDAY.
-- End Changed Discussion --
&& .MARINE...
-- Changed Discussion --
WEAK GRADIENT EXPECTED INTO THIS WEEKEND WITH HIGH PRESSURE ALONG THE COAST. EASTERLY FLOW DOMINATES THROUGH MUCH OF THE TIME GENERALLY 10 KT OR LESS. NO SCA CONDITIONS ARE EXPECTED INTO EARLY NEXT WEEK. COLD FRONT APPROACHES MID-WEEK.
-- End Changed Discussion --
&& .LWX WATCHES/WARNINGS/ADVISORIES... DC...NONE. MD...NONE. VA...NONE. WV...NONE. MARINE...NONE. && $$ SYNOPSIS...BPP NEAR TERM...BPP SHORT TERM...BPP LONG TERM...CEM AVIATION...BPP/CEM MARINE...BPP/CEM

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.